T
T4 cell (helper T cell) 72,
159, 322
T8 cell (suppressor T cell)
72, 317, 322
taiga 321
tailless whip scorpion 29
Takayama test 45
tapeworms 321
tarantula 321
tardigrade 321
tautonym 321
taxis 321
taxon 321
taxonomy 209, 312, 322
TB (tuberculosis) 128, 189,
190, 331
TCA (tricarboxylic acid) cycle
191
T cell 72, 210, 286, 322, 326
Teichmann test 45
telomerase 322
telomere 61,66,68, 322
telophase 215,219, 223,
322
temperate deciduous forest
322
temperate rain forest 330
temperate virus 322
temperature, basal body
(BBT) 35
temperature scales 59–60,
124–125, 286, 322–323
temporal isolation 274
temporal lobe 62
tendon (sinew) 323
tendril 323
tentacle-tube-foot suspension
feeder 318
tepuis 323
teratogen 323
terminal deletion 91
termites (Isoptera) 120, 182
territory 323
tertiary consumer 323
Tertiary period 323
tertiary structure 277,281,
323
testcross 323
testis (testes; testicle) 323
testosterone 18, 304, 323
tetanus (lockjaw) 323
tetrahedron Seecoordination
tetrahydrofolate 324
tetrapod 324
tetrasomy 18
TH1, TH2 helper T cells 159
thalamus 324
thalassemia 94, 324
thallus 204–205
Theiler, Max 324
Theorell, Axel Hugo Theodor
324–325
therapeutic index 325
thermoluminescence dating
284–285
thermolysin 325
thermolysis 325
thermometers 59–60,
124–125, 286, 322–323
thermoregulation 325
thick filament 325
thigmomorphogenesis 325
thigmotropism 325
thoracic vertebrae 340, 340
thorium-lead dating 325
threatened species 325
three-dimensional
quantitative structure-
activity relationship (3D-
QSAR) 76, 325
threshold potential 325
thrombocyte (platelet) 269
thylakoids 315, 325
thymus 325–326
thyroid gland 190, 260, 326
thyroid-releasing hormone
(TRH) 326
thyroid-stimulating hormone
(TSH) 268, 326
thyroxine 186, 326
tibia 308
tick paralysis 326
ticks 182, 222, 297, 326
tight junction 326
Ti plasmid 326
tissue 326
T killer cell (cytotoxic T cell)
88, 322
tobacco mosaic virus (TMV)
326
tonic receptor 305
tonoplast 60, 326
topless tree 326
torpor 326
totipotency 326
totipotent cell 176
toxicity 326
toxicodendron dermatitis
286
Toxicodendronspp. 270–271
toxin 326
trace elements 327
trachea 68, 209, 327, 327
tracheae 327
tracheal system 327
tracheid 327
Tracheophyta 338
trans327, 333
transcription 327
transcription factor 328
transduction 328
transferase 328
transferrin 328
transfer RNA (tRNA) 328
transformation 328
transition element 328
transition-state analog 328translation 328
translocation 328, 329
transmissible spongiform
encephalopathy (TSE) 193
transmission electron
microscope 109
transpiration 328
transposon 177, 328
trapping 329
tree 329
tree-ring dating
(dendrochronology) 92,
135
trematode 159
trembling disease (kuru) 193,
275
trench fever 329
Treponemaspp. 312
TRH (thyroid-releasing
hormone) 326
triacylglycerol (fat) 125, 206
trial-and-error learning
(associative learning) 30,
69, 254, 261
Triassic 329
tricarboxylic acid (TCA) cycle
191
Trichinella spiralis329, 348
trichinosis 329
trichocyst 329
trichomonads 26
tricuspid valve 339
triiodothyronine (T3) 326
trilobite (Trilobita) 329
triose 226
triplet code 329
triploblastic 329
triploidy 329
trisomy 18, 67, 247
triticale 12
triticale stem rust 300
tRNA (transfer RNA) 328
troglodytes 29
Trombiculidae 63–64
troop 330
trophallaxis 330
trophic level 32, 63, 162, 330
trophic structure 330
trophoblast 330
tropical rain forest 285, 330
tropic hormone 330
tropism 330
tropomyosin 3
troponin 3–4
Trouvelot, Léopold 201
Trypanosoma brucei 349
Trypanosoma cruzi 279
trypanosomes 197
trypanosomiasis 330,
348–349
tryptophan 167
TSE (transmissible
spongiform
encephalopathy) 193tsetse flies 330
TSH (thyroid-stimulating
hormone) 268
T suppressor cells 72
tuber 330
tuberculosis (TB) 128, 189,
190, 331
tubulus renalis colligens 75
tularemia 331
tumor (neoplasm) 331, 346
tumor suppressor gene 331
tundra 331
Tunga penetrans(chigoe flea)
64
tunicate 334
turgid 331
turgor pressure 331
Turner’s syndrome 351
turtles 331
Tuskes, Paul 228
Tuttle, James 228
twins 331–332
tympanic membrane 332
Tympanuchus cupido cupido
(heath hen) 157
type 1,2,3 copper 332
Type I, II, III survivorship
curves 318
type species 332
type specimen 332
typhus 302, 332
typhus fever 244
tyrosinase 332
tyrosine kinase (PtKs) 332
tyrosine kinase receptor 332U
UAA 247
UAG 247
ubiquitin 276
ubiquitination 276
ubiquitous 333
Uca pugnax(fiddler crab) 11
UGA 247
ulcers 92, 138
ulna 308
ultimate causation 333
ultrasound 333
ultraviolet light 129
umbel 175, 176
umbilicate lichens 204
umwelt 333
uniform dispersion 98
uniformitarianism 333
unifying pleiotropy 270
unsaturated fatty acids 125,
333–334
upper motor neuron 227
uranium 235, 238 (fission
track dating) 284
urea 334
urea cycle 191
urease 334Index 399